Journal
NATURE COMMUNICATIONS
Volume 10, Issue -, Pages -Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/s41467-018-08001-3
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Funding
- Australian Government through the Australian Research Council's LIEF funding scheme [LE0882854]
- NERC SoS Tellurium and Selenium Cycling and Supply (TeASe) consortium grant [NE/M010848/1]
- NERC Deep Volatiles consortium grant [NE/M000427/1]
- NERC From Arc Magmas to Ore Systems (FAMOS) consortium grant [NE/P017045/1]
- ERC Starting Grant [306655]
- TeASe
- Cambridge Commonwealth and European Trust
- Australian and New Zealand consortium of universities and government agencies
- NERC [NE/M010848/1, NE/M000427/1, 1768937, NE/M011801/2, NE/P017053/1, NE/P017045/1] Funding Source: UKRI
- Australian Research Council [LE0882854] Funding Source: Australian Research Council
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Mantle plume-related magmas typically have higher chalcophile and siderophile element (CSE) contents than mid-ocean ridge basalts (MORB). These differences are often attributed to sulfide-under-saturation of plume-related melts. However, because of eruption-related degassing of sulfur (S) and the compositional, pressure, temperature and redox effects on S-solubility, understanding the magmatic behavior of S is challenging. Using CSE data for oceanic plateau basalts (OPB), which rarely degas S, we show that many ORB are sulfide-saturated. Differences in the timing of sulfide-saturation between individual ORB suites can be explained by pressure effects on sulfur solubility associated with ascent through over-thickened crust. Importantly, where S-degassing does occur, ORB have higher CSE contents than S-undegassed melts at similar stages of differentiation. This can be explained by resorption of earlier-formed sulfides, which might play an important role in enriching degassed melts in sulfide-compatible CSE and potentially contributes to anomalous enrichments of CSE in the crust.
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